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Details van artikel 22 van 32 gevonden artikelen
| Titel: |
Quantitative controls on submarine slope failure morphology |
| Auteur: |
Lee, Homa J. Schwab, William C. Edwards, Brian D. Kayen, Robert E. |
| Verschenen in: |
Marine georesources & geotechnology |
| Paginering: | Jaargang 10 (1991) nr. 1-2 pagina's 143-157 |
| Jaar: |
1991-01 |
| Inhoud: |
The concept of the steady-state of deformation can be applied to predicting the ultimate form a landslide will take. The steady-state condition, defined by a line in void ratio-effective stress space, exists at large levels of strain and remolding. Conceptually, if sediment initially exists with void ratio-effective stress conditions above the steady-state line, the sediment shear strength will decrease during a transient loading event, such as an earthquake or storm. If the reduced shear strength existing at the steady state is less than the downslope shear stress induced by gravity, then large-scale internal deformation, disintegration, and flow will occur. If sediment exists at a state that is on or below the steady-state line, disintegration and flow will typically not occur. Confirming these concepts, studies of subaerial landslides show an association between disintegrative flows and void ratio-effective stress states above the steady-state line. Nondisintegrative landslides are associated with void ratio-effective stress states on or below the steady-state line. A subsequent investigation of three submarine landslides also confirmed these concepts. One limited-deformation slump had an initial state coinciding with the steady-state line, and a second limited-deformation slump had an initial state above the steady-state line but gravitational shear stresses less than the steady-state shear strength. A third failure involved sediment with an initial state above the steady-state line and initial gravitational shear stresses greater than the steady-state shear strength. A disintegrative flow was the result. The flow stopped near a change in slope where the gravitational shear stress fell below the steady-state shear strength. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 22 van 32 gevonden artikelen
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